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Old 04-30-2014, 12:41 PM   #1
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Chip and dyno tune?

I was thinking I have a lot of power in my motor that I haven't unleashed. I'm trying to figure out if I should pony up the cash and get a dump tune this summer. Here is a list of upgrades,

Dart block forged 347 stroker
10.25/1 compression pistons
H beam rods
Trickflow twisted wedge heads
Trickflow upper and lower
Roller cam 495/518
1/6 roller rockers
Bbk75mm throttlebody
30# ford racing injectors
Matched maf sensor
Msd billet distributor
Maf 6al ignition box
A9l computer
190 lph fuel pump
Stock fuel rails
Fuel pressure regulator

Their are more mods but this is a good extent. Some say the a9l computer will account for a lot of these mods but I am staring to doubt some of the info I got years ago. Would it be a good investment to buy a chip with some tunes, with the intent of dyno tuning it later? I have great power all the time, my motor revs to 6k like it's nothing, I even popped the hatch when I got a tight grip on the pavement last year with the 295/60/15's on the back. Any info of thoughts would be appreciated.


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Old 04-30-2014, 02:58 PM   #2
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you would benefit from a custom dyno tune like crazy. when you throw a engine together with alot of aftermarket parts like yours and leave the computer alone the computer will still be reading for a stock engine blah blah blah.. well the tune will go in and match everything together to pretty much synchronize all the parts and make everything work like it should. id estimate you can get a 30-50 hp increase with a custom dyno tune. there expensive but work good. out of all the people i have talked to, the biggest horsepower increase besides heads and cam put together is the dyno tune they got afterwards.
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Old 04-30-2014, 04:48 PM   #3
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That's the feel I have, but would I have to buy a sct or other burnable chip before I do the dyno tune? Luck enough for me the guy who built my engine also dyno tunes.

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Old 04-30-2014, 09:34 PM   #4
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No, they supply the chip with the tune. Most shops do anyways

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Old 04-30-2014, 09:55 PM   #5
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Custom dyno tune. The A9L is not some magic computer like everyone seems to think it is, you are running nowhere NEAR what you need to be with all that and a stock tune. Likely pig rich and with those mods down a solid 50rwhp, probably a lot more. I picked up 40whp from baseline to final dyno with just a HCI and that was running a A9L as well. I'm not sure where the whole thing where "I don't need a tune I have a A9L" got started but it is and has NEVER been true.

If you have a shop within driving distance, set up a dyno day and have the burn you a custom dyno tune. Getting a mail order chip for your setup is not going to cut it.
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Old 05-01-2014, 08:49 AM   #6
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There is nowhere you can get a mail order tune for that combo as there is too much to compensate for.

What kinda heads?
Any work to them?
What kind of intake?
I hope you have LT headers.

A custom dyno tune is what you need. They will sell you a burnable chip and burn a custom tune on it for you. Dyno it before the tune and then compare it to the final number. Remember that the dyno is a tuning tool so do not get so caught up in the final number.

One thing I can tell you is that with a custom tune, yes you will pick up some peak power but it will make it seem faster as he will get the power that you are missing under the curve with the fine tuning. He can also tune for driveability and part throttle response.
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391 rwhp & 424 rwtq...Mustang Dyno 11.5@122mph
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Old 05-01-2014, 10:36 AM   #7
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I do not have lt's right now. I have shorties, because the plan was to twin turbo it, but since our second child was born, my wife is a stay at home mom now. And along with that is the loss in income, so I am thinking of staying n/a for now. Would lt's make a big difference?

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Old 05-01-2014, 11:15 AM   #8
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Everything makes a difference.....

With me my injectors are near the end so I was having some pinging down low when lugging a little. It's a balance of trying to squeeze as much power as you can with being safe. Playing with timing and fuel pressure is a dangerous dance.
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Old 05-01-2014, 01:28 PM   #9
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Tune is going to make your biggest difference. It will feel like you put a permanent 75-100 shot onto the car if you are running that combo un-tuned and you go get a tune.
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Old 05-02-2014, 01:24 PM   #10
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My builder told me he can adjust timing and afr, as long as I have a adjustable regulator for 350.00, but he told me if I wanted mire of a tune to purchase a pms and the can tune with that for 500.00 as for burning a chip he said he has never seen it done.

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Old 05-02-2014, 01:53 PM   #11
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Quote:
Originally Posted by powerpony347 View Post
My builder told me he can adjust timing and afr, as long as I have a adjustable regulator for 350.00, but he told me if I wanted mire of a tune to purchase a pms and the can tune with that for 500.00 as for burning a chip he said he has never seen it done.

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Lol, your builder is an idiot. Last two 5.0s I had done had diablosport chips burnt by a custom dyno tuner. I was told the same thing about an AFPR by a shop local to me. I literally laughed out loud and took my car an hour south to another shop vs these guys who were 10 minutes away.
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Old 05-02-2014, 05:33 PM   #12
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Kinda how I felt, problem is their isn't very many shops around me the does it. A couple import shops may but I have a hard time talking to these guys.

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Old 05-02-2014, 06:12 PM   #13
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I had mustang muscle here in Saint louis told me if I bought a FPR that they'd tune it for 100.

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